We unlocked a PDF for a user and he asked if we could teach him how we did it.

So, I made up these instructions and sent them to him. Waiting for him to convert the binary and see what it says. (if he knows how to)

1) We put your file on a USB drive and transferred it to an old Windows 95 computer that we keep just for this purpose.
2) On the Windows 95 computer we installed version 3.02 of Adobe Acrobat. It works with Windows 95 and is the first version to include “form filling functions”.
3) We decompiled Acrobat so that we could enter this binary code into the program and then recompile it. 01010111 01100101 00100000 01100001 01110010 01100101 00100000 01110000 01110101 01101100 01101100 01101001 01101110 01100111 00100000 01111001 01101111 01110101 01110010 00100000 01101100 01100101 01100111
4) This allows us to open your PDF in Acrobat and then save it in Microsoft Word 95 and it removes the security locks.
5) We then took the Word file and transferred it back, via USB, to our Windows 7 computer and opened it in Microsoft Word 2010.
6) Using the Microsoft Office plugin we installed on the Win 7 computer, we saved the Word file back to a PDF and then emailed the file to you.